Gas appliance



March 19,` 1929.A A, J. MILLIGAN 1,105,530

y GAS APLIANcE Filed Nov. 24, 1926 2 INVNTOR ATTORNEY rasata ein. ipe, ieee'.

treatin f Ui-ren sra-rss estelar i ALBERT J. iviILLIGArnoF een rnnrrcisco, csiiiroiiivie.' i

GAS APPLEANCE.

Application filed November 24, 1925. SerialNo. 150,49;

rants, where much time is lost in regulating the gas for different kinds of fry orders, re quiring dilierent volumes ol heat. vWith this f invention applied to several burners, the burner adjusted to the desired volume olf heat is chosen and the utensil set upon it without further attention until it .is done. One of the advantages of this invention' is lowering thetemperature in small kitchens during the rushl'iourTsince only those burners actually cook-V It is an established tact that ing are ignited. ljew cooks will turn oil a burner alteritheyA are through with. it, accounting for Wasted'heat,

oiten as high'as'ityv per cent overfthat required in actual cooking. 1 Y

Other objects and advantages .will appear as this descriptionprogresses.v

In this specification and the 'annexed draw-i ings the invention is illustrated in theiiorm considered the best, but it is to be understood that itis not limited to suchiiorm, because it may be embodied in other forms, and it is also to be understood that in and by the claims followingv the' description itis desired tocover the invention in whatsoever Jform it may be embodied..v 4 Y In the accompanying one sheet of draw-, ings; Figure l isa sidev elevation of a gas stove, partlyr in vertical section, having this invention applied to the burner thereof. Fig-k ure Q'is a plan view from above of the same, y

the'stove being omitted.r Figure 3 is anenlarged fragmentary .detail in horizontal seetion,ot the gas control. ol a conventional lburner having this'inventionl combined theres with. Figure 4 is a similar yview ot the gas control parts, showing a moditiediorni wherein the pilot tube is utilized inthe automatic operation of the control valve.

' ln Vdetailthe construction illustrated in the drawings, see Figure l, comprises the stove top l supported onV the legs Zand having the open grids The kburner comprising the mixing chamber llathe throat and the aspirator 6 is mounted beneath the grids'on the support 7 at the rear 'and at the iront on'tlie pipe 9. This combination comprises the coii.

modifications to lit any `type to which this invention is applicable, with suitable adjust- 'ment as provided zlor.

The vautomatic gas con trol element, see Fig-V variations that may lexist in the. diaineterol theeiid ll; the nipple is internally provided with the compressible gasket l2 composedfof.

any suitable asbestos compound adapted to.v give the necessary elasticity, with heatk resisting Athrough a central opening in the n head 13 of the diaphragm across the face oi the aspirator S; rl`he inner end ofthe nipple is trans-` versely drilled to Vreceive the controlplug` valve lll, ground therein to make a gas'tight tit. .The end or this plug'is-threaded to receive thescrew l5' to force the washer 16V against the side oic the nipple to hold the plug vinproper operative position without u-nduev service cock 8 that is screwed into the serviceV C( 7) C( 9 I ventional gas shelf or het vplate with 'f f a ure 31, comprises the nipple l0 centrally drilled l to slip onto the end 1l ciE the manual gas f service cock 8. i 'ilo compensate for slight:

qualities. r This nipple *extends L75 friction, so that this plug is Vfreely operable:`1

withoutv gas leakage..V The opposite end of the plug is drilled to receive the'transverse pi-'i'i l7 fixed therein.; The head 13 isf provided with alateral gap to pass the projecting headl f:

of the plug 14. Y Y 1 "l/Vith thev plug in the open position, thatA is with the pin 17 raised, in Figure l, the

central'hole 19 is drilled through the end i of the nipple l0 and the plug lll, to meet the A gas chamber 20, betweenthe end ofthe cock'S and the 'bottom of. the hole extending into` the nipple. ril`his hole Vllis arranged in-v aXial alinement with the axis oil' the throat 5 of the burner and is Vwithin the aspirator 6".

The location ofthe control valve lwithin 4 1005 the aspirator has several advantages, there? in it is .protected from accumulations of. grease,,spilled food stuff and othcrzinatter` liable to interfere with its free andeasy workingA lts location also'v provides lor the-easy installation ,ofthis invention to :stoves havthrough the headl.

..105- ing a'limited distance available. betweenthe Y cock 8 and the'faspirator-G, without altera-` Y .tion oit the stove .and burner parts, beyond-` merely-cutting a vOap to pass thevalve y'lil 110 rEhe ypin l? is bent at right angles outside. j

the aspirator `Gand pivotally eXtendsthroug-h the socket formed by the spiral coil 21, the

end 22 of Which'extends forward to form the Vengaging the surfacesr of the levers 22 and 26 for .the purpose of longitudinally adjusting the trip on the lever 22. y Y

The'trip 28 preferably consists of aV single length of wire bent back upon itself, one extension being bent laterally at 29, terminating A in the clamp end 27, the opposite end being bent at and 31 to form a loop, the'parallel extensions 32 and 33 of which rest upon the top of the said throat of the burner,aeting as aV fulcrum for the lever 22. The extension 32 terminates in the other clamp end 27. i

AThe weight' 24 acts as a counter-balance for the Weight of thelever '22 and the trip 2S, to hold the plug valve-14 normally in theelosed position by depressing the pinl, the lever trip 28 fulcruming on the extension 32-83 of the loop.

.The pilot .light for igniting, the burner, comprises thesmall'tube34 having its inner end driven tightly into thev lugV on the side of the nipple 10, and having a by-pass leading intothe chamber 20. The opposite end of the `tube extends forward and is directed across the top of the burner 4.

This invention operates substantially asY follows: The utensil X is placed in position on top of the grids The service cock 8 is then turned on manually and the gas ignited fat theburner in the usualV manner, this also not interfered with by the combinationof invention. To determine the on and off '60 lof said pinand bent haclrup'onitself'to form positions of the control valve 14, vit is provided I ignites the pilot light. Vhen theutensil X is lifted., the trip 28 rises,- under the inliuence of the counterweight 24, this depresses the en'd of the vlever 22 carrying the pin 17 downward, causing it to turn theplfug 14 into the off position and arrest: the flow of gas through the passage 19, without shutting off the pilot light. Vhen a utensil Ais again plaeedin position, the trip is depressed and the reverse operation of the mechanisms controlling the plug 14 causes it to return to the onV7 position Y again, admitting gas to the burner, whichignites from the-pilot, the flow i of gas being automatically controlled by vthe manipulation of the utensil X. The manual control of theburner through the cock 8 is with the annular 37, having a segmental ,ojap therein/engaging the pin 38 lixed y Y in-the side of the nipple 10. Y(i5 Referring to Figurev4, the construction and operation of the other mechanisms are ,unchangedexcepting that the plug 14 is provided withan axial by-pass'at ai communicat-ing with the hollow pin at x17 driven into the plug` ai to meet it. The end of the pin 1317 is bent and extends into the bent end m21 of the lever w22, that is flattened at Q02 to re- .eeive the clamped ends 27-27 of the trip 28.

The.counter-weight 24 is fixed ,directly to the f end x21. The transverse gate or bly-pass through the plug fr, l(3o-operating with the hole` 1:19 is opened at its inner end into the larfrer onenin` :03?` communicatinowith the C L t t? times that the valve 8 is open, to iow through the holem, the by-.pass ai, the pin xl7 and the Vchamber 20, whereby the gas is free at all f lever w22 pivoted thereon, and open at the end- 40 ldirected toward'the top of the` burner-4,

rall these tubularfparts areladaptedltoact as a pilot tube for igniting the burner.--The mode of operation in controlling the valve m14 by the operation of the trip 28, is the same f' in the modification'shownv in Figure 4, as,

shown and described as to Figure 1., The

advantage of the modification is. the elimination of the .secondary vpilot tube by incorporating it within theV operating mechanism of the control valve w14.

Having thus describedthis inventionA What l claim and desire to-secure by Letters Patent is:` Y

1. In combination with a gas Vstove'adapt-edfv to support a utensil; a gas burner; a rotary Vcontrol valve having a pin projecting atright angles therefrom; a counterbalanced control@ lever pivoted on said pin and within Iits length resting on the throat'of said'burnerV the rlati ter affording a fulcrum therefor;anda'trip` fixed to said controlV arm and adapted toengage said utensil.

2. In combination with a gas stove adapted -V to support a utensil and having a gasburnerg x a rotary control valve on said burner having a pin projecting at right angles therefrom 57a control lever pivoted on said-pin and extending alongl the throat of said burner and having a slidable part resting on said throat-'the I latter affordinga supportingfulcrum thereforand.having a trip adapted to engage said utensil. i

3. In combination with a. gas stove adapted to support ai utensil and having a gas burner g1 and a servicevalve;.fa nipple interposed betweensaid service valve and said burner; a l rotary control valve in said nipple having a' i valve control pin projecting at right angles 1 therefrom; a wire lever having a. 'transverse coil intermediate its ends and pivoted on said 'fpin one end olf said'lever extending forwardieep resting on and fulcrumed on the throat of said Vburner and having Y an extension adapted toengage said utensil.

` 1,705,530 f v Y f `3 4. In combination with a gas stove adapted sil undjloent back upon itself and having a to support a utensil and having a gas burner laterally looped extension adapted to rest on 10 and a rotary control valve having an angular and fulcrum on the throatof said burner and pin projecting at right angles therefrom; a its opposite ends bent hack and clamped to the 5 Wire control lever having a coiled end pivotloop 4ofsaid control lever ally engaging said pin and its other end flat- In testimony whereof l have hereunto af' 5.

tened und bent'haclr upon itself to form a fixed my signaunure.`

loop; a wire trip adapted to engage said utenv *'J. MILLIGAN Y 

